27  * sd_zbc_get_zone_wp_offset - Get zone write pointer offset.
28  * @zone: Zone for which to return the write pointer offset.
30  * Return: offset of the write pointer from the start of the zone.
32 static unsigned int sd_zbc_get_zone_wp_offset(struct blk_zone *zone)  in sd_zbc_get_zone_wp_offset()  argument
34 	if (zone->type == ZBC_ZONE_TYPE_CONV)  in sd_zbc_get_zone_wp_offset()
37 	switch (zone->cond) {  in sd_zbc_get_zone_wp_offset()
41 		return zone->wp - zone->start;  in sd_zbc_get_zone_wp_offset()
43 		return zone->len;  in sd_zbc_get_zone_wp_offset()
50 		 * write pointer. Use 0 as for an empty zone.  in sd_zbc_get_zone_wp_offset()
56 /* Whether or not a SCSI zone descriptor describes a gap zone. */
63  * sd_zbc_parse_report - Parse a SCSI zone descriptor
65  * @buf: SCSI zone descriptor.
66  * @idx: Index of the zone relative to the first zone reported by the current
73  * Convert a SCSI zone descriptor into struct blk_zone format. Additionally,
80 	struct blk_zone zone = { 0 };  in sd_zbc_parse_report()  local
87 	zone.type = buf[0] & 0x0f;  in sd_zbc_parse_report()
88 	zone.cond = (buf[1] >> 4) & 0xf;  in sd_zbc_parse_report()
90 		zone.reset = 1;  in sd_zbc_parse_report()
92 		zone.non_seq = 1;  in sd_zbc_parse_report()
95 	zone.start = logical_to_sectors(sdp, start_lba);  in sd_zbc_parse_report()
96 	zone.capacity = logical_to_sectors(sdp, get_unaligned_be64(&buf[8]));  in sd_zbc_parse_report()
97 	zone.len = zone.capacity;  in sd_zbc_parse_report()
100 		if (zone.len > gran) {  in sd_zbc_parse_report()
102 				  "Invalid zone at LBA %llu with capacity %llu and length %llu; granularity = %llu\n",  in sd_zbc_parse_report()
104 				  sectors_to_logical(sdp, zone.capacity),  in sd_zbc_parse_report()
105 				  sectors_to_logical(sdp, zone.len),  in sd_zbc_parse_report()
110 		 * Use the starting LBA granularity instead of the zone length  in sd_zbc_parse_report()
113 		zone.len = gran;  in sd_zbc_parse_report()
115 	if (zone.cond == ZBC_ZONE_COND_FULL)  in sd_zbc_parse_report()
116 		zone.wp = zone.start + zone.len;  in sd_zbc_parse_report()
118 		zone.wp = logical_to_sectors(sdp, get_unaligned_be64(&buf[24]));  in sd_zbc_parse_report()
120 	ret = cb(&zone, idx, data);  in sd_zbc_parse_report()
125 		sdkp->rev_wp_offset[idx] = sd_zbc_get_zone_wp_offset(&zone);  in sd_zbc_parse_report()
209 	 * Report zone buffer size should be at most 64B times the number of  in sd_zbc_alloc_report_buffer()
213 	 * Furthermore, since the report zone command cannot be split, make  in sd_zbc_alloc_report_buffer()
237  * sd_zbc_zone_sectors - Get the device zone size in number of 512B sectors.
250  * @cb: Callback function called to report zone information.
253  * Called by the block layer to iterate over zone information. See also the
300 					  "Zone %d at LBA %llu is invalid: %llu + %llu\n",  in sd_zbc_report_zones()
310 					  "Gap zone without constant LBA offsets\n");  in sd_zbc_report_zones()
353 static int sd_zbc_update_wp_offset_cb(struct blk_zone *zone, unsigned int idx,  in sd_zbc_update_wp_offset_cb()  argument
360 	sdkp->zones_wp_offset[idx] = sd_zbc_get_zone_wp_offset(zone);  in sd_zbc_update_wp_offset_cb()
366  * An attempt to append a zone triggered an invalid write pointer error.
367  * Reread the write pointer of the zone(s) in which the append failed.
405  * @sd_zbc_prepare_zone_append() handles the necessary zone wrote locking and
436 		 * We are about to schedule work to update a zone write pointer  in sd_zbc_prepare_zone_append()
437 		 * offset, which will cause the zone append command to be  in sd_zbc_prepare_zone_append()
468  * sd_zbc_setup_zone_mgmt_cmnd - Prepare a zone ZBC_OUT command. The operations
524  * sd_zbc_zone_wp_update - Update cached zone write pointer upon cmd completion
528  * Called from sd_zbc_complete() to handle the update of the cached zone write
543 	 * pointer offset cache, we must mark the zone wp offset entry as  in sd_zbc_zone_wp_update()
544 	 * invalid to force an update from disk the next time a zone append  in sd_zbc_zone_wp_update()
557 		 * Force an update of the zone write pointer offset on  in sd_zbc_zone_wp_update()
558 		 * the next zone append access.  in sd_zbc_zone_wp_update()
603  * Called from sd_done() to handle zone commands errors and updates to the
604  * device queue zone write pointer offset cahce.
617 		 * INVALID FIELD IN CDB error: a zone management command was  in sd_zbc_complete()
618 		 * attempted on a conventional zone. Nothing to worry about,  in sd_zbc_complete()
663 	/* Check zone alignment method */  in sd_zbc_check_zoned_characteristics()
667 		/* Use zone length */  in sd_zbc_check_zoned_characteristics()
676 				  "Invalid zone starting LBA granularity %llu\n",  in sd_zbc_check_zoned_characteristics()
683 		sd_printk(KERN_ERR, sdkp, "Invalid zone alignment method\n");  in sd_zbc_check_zoned_characteristics()
706  * @zblocks: zone size in logical blocks
708  * Get the device zone size and check that the device capacity as reported
722 	/* Do a report zone to get max_lba and the size of the first zone */  in sd_zbc_check_capacity()
741 		/* Get the size of the first reported zone */  in sd_zbc_check_capacity()
747 					  "Zone size too large\n");  in sd_zbc_check_capacity()
756 			  "Zone size %llu is not a power of two.\n",  in sd_zbc_check_capacity()
773 			  "%u zones of %u logical blocks + 1 runt zone\n",  in sd_zbc_print_zones()
838 	 * For all zoned disks, initialize zone append emulation data if not  in sd_zbc_revalidate_zones()
901  * sd_zbc_read_zones - Read zone information and update the request queue
905  * Read zone information and update the request queue zone characteristics and
920 		 * required. Nevertheless, free the disk zone information in  in sd_zbc_read_zones()